Related by context. Frequent words. (Click for all words.) 70 pulsar 70 supernova explosion 69 magnetar 68 dwarf galaxy 68 Eta Carinae 67 X ray emission 67 pulsars 66 neutron star 64 planet orbiting 63 gamma ray burst 63 distant galaxy 63 galaxy cluster 62 dwarf galaxies 62 supernova remnant 62 supernovae 62 supernova 61 neutron stars 61 quasar 61 GRBs 61 elliptical galaxies 61 supermassive black hole 61 globular clusters 60 Andromeda Galaxy 60 galaxies 60 quasars 60 extrasolar planet 60 XMM Newton 60 galaxy clusters 60 accreting 59 orbits 59 brown dwarf 59 supernovas 59 exoplanets 59 HD #b [002] 59 supernova explosions 59 interstellar dust 59 Saturn rings 58 COROT 58 gravitational waves 58 Milky Way Galaxy 58 atomic nuclei 58 spacetime 58 Large Magellanic Cloud 58 gravitational lensing 58 Orion Nebula 58 gamma rays 58 nebula 58 galaxy 58 planets 57 gravitationally 57 gamma ray bursts 57 spiral galaxies 57 Milky Way galaxy 57 super Earths 57 coronal mass ejection 57 brown dwarfs 57 magnetic fields 57 Earth magnetosphere 57 supermassive black holes 56 redshift 56 subatomic particles 56 extrasolar planets 56 Sedna 56 neutrino 56 orbiting 56 gravitational wave 56 spiral galaxy 56 planets orbiting 56 positrons 56 angular momentum 56 cosmic rays 56 interstellar medium 56 distant galaxies 56 occultation 56 cosmic dust 56 astronomers 55 nebulae 55 ejecta 55 exoplanet 55 muons 55 neutrons 55 rocky planets 55 Milky Way 55 cosmic ray 55 Betelgeuse 55 comet nucleus 55 interferometry 55 neutrinos 55 Gliese 54 terrestrial planets 54 X ray Observatory 54 optical telescopes 54 comet 54 NASA Cassini spacecraft 54 photons 54 cosmic microwave background 54 quark gluon plasma 53 sunspot 53 Solar System 53 Halley Comet 53 Iapetus